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Is it possible to differentiate between choledochal cyst and congenital biliary atresia (type I cyst) by antenatal ultrasonography?
Authors:H Matsubara  N Oya  Y Suzuki  S Kajiura  K Suzumori  Y Matsuo  T Suzuki  T Hashimoto
Affiliation:Department of Obstetrics and Gynecology, Nagoya City University Medical School, Nagoya, Japan.
Abstract:Both choledochal cyst and congenital biliary atresia (type I cyst) may share the same ultrasonographic pattern. We report 2 cases which were shown to have cystic structures on the upper abdomen by antenatal ultrasonography. The size of the choledochal cyst found at 24 weeks' gestation increased steadily as gestational age advanced. But the size of the cyst in congenital biliary atresia found at 29 weeks' gestation remained unchanged throughout the remaining pregnancy. Cyst enlargement, therefore, may suggest the possibility of a choledochal cyst.
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